All depends on how and where you ride. All Chinese parts are built to a minimum standard. Some last..some don't. Some come from the factory not working. Your experience will differ from others. In short, we can't say for sure what will fail first as there are no specifics or constant failures to draw from. One thing for sure, mostly electrical issues lately such as switches, connectors, sensors and control units. But nothing specific or regular enough to say "Get an extra one of these".